Master of the Deep 1 The Wright Brothers made it possible for man to fly with the birds.Emile Gagnan and Cousteau designed the aqua-lung, which is an underwater breathing tool.He was sent to a naval base in Toulon, where he swam in the Mediterranean Sea every day to strengthen his arms.Exploration of the seas became his job.Sof 2 Cousteau had dreamed of swimming free underwater.3 When World War II ended in 1945, Cousteau continued his exploration of the ocean and sea depths.Cousteau also developed an underwater camera, and filmed his journeys under the sea.Jacques Yves Cousteau made it possible for man to swim with the fish.These limited the movements of the divers.The aqua-lung, which could provide air to the diver, was first tested in 1943.He also approached the National Geographic Society (NGS) for support.The Society provided him with money to continue his submarine explorations.